请求参数绑定集合类型

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最新推荐文章于 2025-04-25 19:18:08 发布

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分类专栏： SpringMVC 文章标签： SpringMVC SpringMVC

本文链接：https://blog.youkuaiyun.com/qq_43462019/article/details/89066815

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本文介绍了一个使用SpringMVC实现的表单提交及参数绑定的示例，包括前端表单设计、Controller处理逻辑及JavaBean定义。通过实例展示了如何将表单中的数据绑定到JavaBean对象中，特别是list和map类型的属性。

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前端代码：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>list和map的集合</title>
</head>
<body>
<%--把数据封装Account类中,类中存在list和map的集合--%>
<form action="param/saveAccount" method="post">
    姓名：<input type="text" name="username" placeholder="请输入您的姓名"><br>
    密码：<input type="password" name="password" placeholder="请输入您的密码"><br>
    金额：<input type="text" name="money" placeholder="请输入您的金额"><br>

    曾用名：<input type="text" name="list[0].uname" placeholder="请输入您的姓名"><br>
    年龄：<input type="text" name="list[0].age" placeholder="请输入您的年龄"><br>

    曾用名：<input type="text" name="map['one'].uname" placeholder="请输入您的姓名"><br>
    年龄：<input type="text" name="map['one'].age" placeholder="请输入您的年龄"><br>
    <input type="submit" value="提交">
</form>
</body>
</html>

请求参数绑定把数据封装到JavaBean的类中

package Controller;

import domain.Account2;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * 请求参数绑定
 */

@Controller
@RequestMapping("/param")
public class paramController {
    /**
     * 请求参数绑定把数据封装到JavaBean的类中
     * @return
     */
    @RequestMapping("/saveAccount")
    public String saveAccount (Account2 account2){
        System.out.println(account2);
        return "success" ;
    }
}

运行结果：

Account2类

package domain;

import java.io.Serializable;
import java.util.List;
import java.util.Map;

/**
 * 我是
 */
public class Account2 implements Serializable {

    private String username ; //用户名
    private String password ; //密码
    private Double money ; // 价格
    private List<User> list ;
    private Map<String , User> map ;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    public List<User> getList() {
        return list;
    }

    public void setList(List<User> list) {
        this.list = list;
    }

    public Map<String, User> getMap() {
        return map;
    }

    public void setMap(Map<String, User> map) {
        this.map = map;
    }

    @Override
    public String toString() {
        return "Account2{" +
                "username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", money=" + money +
                ", list=" + list +
                ", map=" + map +
                '}';
    }
}

user类：

package domain;

import java.io.Serializable;

/**
 * 我是
 */
public class User implements Serializable {

    private String uname ; // 名字
    private Integer age ; // 年龄

    @Override
    public String toString() {
        return "User{" +
                "uname='" + uname + '\'' +
                ", age=" + age +
                '}';
    }

    public String getUname() {
        return uname;
    }

    public void setUname(String uname) {
        this.uname = uname;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <!-- 配置前端控制器 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 配置解决中文乱码的过滤器 -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

springmvc：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
			    http://www.springframework.org/schema/beans/spring-beans.xsd
			    http://www.springframework.org/schema/context
			    http://www.springframework.org/schema/context/spring-context.xsd
			    http://www.springframework.org/schema/aop
			    http://www.springframework.org/schema/aop/spring-aop.xsd
			    http://www.springframework.org/schema/tx
			    http://www.springframework.org/schema/tx/spring-tx.xsd
			    http://www.springframework.org/schema/mvc
			    http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="Controller"/>
<!--配置映射器处理器,处理器适配器-->
<mvc:annotation-driven/>
<!--视图解析器-->
<bean id="ViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/"/>
    <property name="suffix" value=".jsp"/>
</bean>
<!--释放静态资源-->
<mvc:default-servlet-handler/>

</beans>